Export SearchProvider interface to ui/app_list and use it in athena.

BUG=380444, 380875
R=oshima@chromium.org, xiyuan@chromium.org
TEST=compile succeeds, manually check behavior

Review URL: https://codereview.chromium.org/331523002

git-svn-id: svn://svn.chromium.org/chrome/trunk/src@277094 0039d316-1c4b-4281-b951-d872f2087c98

1 files changed, 58 insertions, 0 deletions

diff --git a/ui/app_list/search_provider.h b/ui/app_list/search_provider.h
new file mode 100644
index 0000000..f8ebfd0
--- /dev/null
+++ b/ui/app_list/search_provider.h
@@ -0,0 +1,58 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef UI_APP_LIST_SEARCH_PROVIDER_H_
+#define UI_APP_LIST_SEARCH_PROVIDER_H_
+
+#include "base/basictypes.h"
+#include "base/callback.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/memory/scoped_vector.h"
+#include "base/strings/string16.h"
+#include "ui/app_list/app_list_export.h"
+
+namespace app_list {
+
+class SearchResult;
+
+class APP_LIST_EXPORT SearchProvider {
+ public:
+  typedef ScopedVector<SearchResult> Results;
+  typedef base::Closure ResultChangedCallback;
+
+  SearchProvider();
+  virtual ~SearchProvider();
+
+  // Invoked to start a query.
+  virtual void Start(const base::string16& query) = 0;
+
+  // Invoked to stop the current query and no more results changes.
+  virtual void Stop() = 0;
+
+  void set_result_changed_callback(const ResultChangedCallback& callback) {
+    result_changed_callback_ = callback;
+  }
+
+  // TODO(mukai): Fix the ownership and copying of the results.
+  void ReleaseResult(std::vector<SearchResult*>* results);
+
+  const Results& results() const { return results_; }
+
+ protected:
+  // Interface for the derived class to generate search results.
+  void Add(scoped_ptr<SearchResult> result);
+  void ClearResults();
+
+ private:
+  void FireResultChanged();
+
+  ResultChangedCallback result_changed_callback_;
+  Results results_;
+
+  DISALLOW_COPY_AND_ASSIGN(SearchProvider);
+};
+
+}  // namespace app_list
+
+#endif  // UI_APP_LIST_SEARCH_PROVIDER_H_